John Walker

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John Walker was a mutant. His parents feared humiliation, and locked John in a cell underground. John was brother's with Steve Rogers, although the brothers didn't even know each other even existed. After 19 years of spending time in a cell, John's father came to John, giving John the news that his mother died (killed by the Red Skull). John's father gave John a newspaper to read, and John saw a man looking exactly the same as himself, called Captain America. John ordered his father to explain, and then later did something to his father that John has kept as a secret.

Months later, John became Captain America, in order to keep his brother's spirit alive. John killed Nazi's and freed Jews, but things turned bad when the Ultimates time-travelled to 1945. The Captain America of 2008 told the Captain America of 1945 to go stop a train. When John got to the train, he killed the Nazi's, destroyed their weapons, but did not see the bomb that was in the train. John was blasted out of the train, losing some limbs, and falling into the icey seas. Many decades later, John somehow freed himself from suspended animation. He found himself in England. John became a construction worker there, and lived a normal life, until after World War Three, Steve Rogers came to England and beat John's friend to a pulp for smoking crack. This entered John's mind as a warning: the world would come to a 4th world war if the heroes went to other countries to do 'good'. John made a armor-plated suit, similar to Captain America's, but different in ways, and called himself U.S Agent.

John searched for Spider-man in montreal, where Spider-man now lives, but didn't find him. He found Spider-man, Wolverine, and Thor in France killing a villain. John took the heroes and attempted to recruite them into John's upcoming team called the West Coast Avengers. John did recruite Wolverine, possibly Thor, Black Widow, Hawkeye, and others.